:root {
  --calendar-normal: #{dark-light-choose(
      lighten($tertiary, 55%),
      darken($tertiary, 25%)
    )};
  --calendar-close-to-working-hours: #{dark-light-choose(
      desaturate(lighten($tertiary, 45%), 15%),
      darken($tertiary, 15%)
    )};
  --calendar-in-working-hours: #{dark-light-choose(
      desaturate(lighten($tertiary, 40%), 20%),
      darken($tertiary, 10%)
    )};
}
